CN104251573A - Single-evaporator-type solar energy and air source combined heat pump and running method thereof - Google Patents
Single-evaporator-type solar energy and air source combined heat pump and running method thereof Download PDFInfo
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- CN104251573A CN104251573A CN201410449074.3A CN201410449074A CN104251573A CN 104251573 A CN104251573 A CN 104251573A CN 201410449074 A CN201410449074 A CN 201410449074A CN 104251573 A CN104251573 A CN 104251573A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/272—Solar heating or cooling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/20—Solar thermal
Abstract
The invention discloses a single-evaporator-type solar energy and air source combined heat pump and a running method thereof. The single-evaporator-type solar energy and air source combined heat pump comprises a heat-collection evaporator, a compressor, a condenser and a throttling valve, a three-way valve is arranged on a pipeline among an outlet of the compressor, an outlet of the heat-collection evaporator and an inlet of the condenser, and a valve is parallelly connected at two ends of the throttling valve. The heat-collection evaporator comprises a heat collection plate, a refrigerant pipeline, a glass cover plate, a heat insulating material, a fan and a surrounding face, the glass cover plate is arranged on the upper portions of the refrigerant pipeline and the heat collection plate, the heat insulating material is arranged at the bottoms of the refrigerant pipeline and the heat collection plate, and the glass cover plate, the heat insulating material and front and rear side faces surround to form an air passage. A solar heat collector and an air-cooling evaporator are organically combined, so that initial investment of a heating system is effectively lowered, and utilization efficiency and utilization level of solar energy different in radiation intensity and air heat energy different in temperature grade are improved. According to sun radiation conditions and outdoor air temperature, the heat pump can reasonably switch among multiple running modes to finally realize high-efficiency heat supply and domestic hot water supply.
Description
Background technology
The whole world building heat supplying and domestic hot-water's energy consumption very large, the living standard that developed country is higher and habits and customs cause huge hot water demand and energy resource consumption, and developing country is then along with the development of urbanization and growth in the living standard can keep the rapid growth of energy consumption of hot water.The heating system that China commonly uses mainly adopts the mode of combustion of fossil fuel, and not only efficiency is low, and seriously polluted; Hot water supply system then mainly adopts gas heater and electric heater, there is the higher problem of wasting with energy grad of energy consumption.Heat supply and domestic hot-water more and more become energy-saving and emission-reduction, administer haze pay close attention to one of field.
In recent years, solar water heater and air source hot pump water heater obtain larger development.But there is the lower and unstable shortcoming of energy density in solar energy, when solar radiation is more weak, conventional solar boilers needs larger erection space to ensure heating capacity, when night without solar radiation time, solar water heater or heating system cannot heat, and usually need a set of backup electric heating system to ensure the reliability of heat supply.Therefore, traditional solar heat pump needs larger initial cost and higher operating cost, constrains its further large scale application.For air source hot pump water heater or heating system, because its heating efficiency and heating capacity all constantly can be decayed with the reduction of outside air temperature, also just reduce and heat reliability under its low temperature.Air source heat pump can only utilize the heat energy contained in air, effectively cannot utilize solar radiant energy, although and in fact winter, many times temperature was very low, intensity of solar radiation is still enough to produce required hot water.
In view of the problem that solar water heater cannot make full use of Low emissivity solar energy, air source heat pump cannot utilize solar radiant energy, the technical scheme that solar energy and heat pump techniques combine is obtained increasing favor.Wherein cold-producing medium directly passes in solar thermal collector by direct-expansion type system, can realize higher evaporating temperature, is conducive to reducing power consumption of compressor, is the system form that a kind of efficiency is higher.Current this kind of technical scheme is mainly divided into two classes: (1) only adopts a direct-expansion type solar energy heat collector as evaporator with heat pump, and namely solar energy is unique thermal source (as patent CN201110388936.2) of heat pump.Compared with conventional solar boilers, this type of scheme make use of more weak solar radiation to a certain extent more fully, but night still cannot heat without during solar radiation, also cannot utilize air heat energy, does not solve without heating problem during solar energy; And solar radiation more weak time, in order to meet the requirement of heating capacity, needing to adopt the larger solar thermal collector of area, making its cost higher; (2) adopt a direct-expansion type solar energy heat collector and a wind-cooled evaporator as evaporator with heat pump, time solar energy spoke is strong, solar energy directly heats, and runs air source heat pump pattern (as patent CN201120054202.6) under not having the sun or the more weak condition of radiation.This type of scheme can utilize solar energy, also air heat energy can be utilized, but heat pump needs employing two evaporimeters, its high cost, system complex, and such scheme can not realize directly heating of air heat energy and solar energy and combining of air heat energy heats.
It should be noted that, when the hot water temperature needed under certain situation is lower or outer temperature is very high (such as: during outer warm 30 DEG C of summer, produce the low-temperature water heating of 10 ~ 20 DEG C, for air heat energy across storing season), extraneous air heat energy also can directly heat, and all realized by air source heat pump at present, cause the energy consumption that heats higher.
Summary of the invention
Based on the problems referred to above, the present invention proposes a kind of single evaporator type solar air source combined heat-pump and operation method thereof, utilize technology to organically combine solar utilization technique and air heat energy, realize the mutual supplement with each other's advantages of these two kinds of regenerative resources, effectively reduce the initial cost of heating.According to solar radiation condition and outside air temperature, thermal-arrest-evaporimeter rationally switches between solar energy heating pattern, air-cooled heat exchange pattern, solar energy heating-air-cooled heat exchange united mode, free convection air-cooled heat exchange pattern and the air-cooled heat exchange united mode of solar energy heating-free convection, system flow rationally switches between heat pump mode and heat pipe pattern, finally realizes efficient heat supply and domestic hot-water supply.
Technical scheme of the present invention is as follows:
A kind of single evaporator type solar air source combined heat-pump, comprises thermal-arrest-evaporimeter, compressor, condenser and choke valve; Described compressor, condenser, choke valve and thermal-arrest-evaporimeter connect and compose heat pump cycle in turn, it is characterized in that: the pipeline of described compressor outlet, thermal-arrest-between evaporator outlet and condenser inlet arranges a triple valve, a valve in parallel at the two ends of choke valve, thermal-arrest-evaporimeter, triple valve, condenser and valve form heat pipe circulation successively; Described thermal-arrest-evaporimeter comprises collecting plate, refrigerant tubing, glass cover-plate, insulation material and blower fan; Described refrigerant tubing and collecting plate form without glass cover plate-type solar thermal collector, and the top of refrigerant tubing and collecting plate arranges glass cover-plate, and bottom arranges insulation material, and described glass cover-plate, insulation material and two sides, front and back enclose air duct; Arrange first respectively at the entrance and exit of air duct to enclose face and second and enclose face, first encloses face and second encloses face and adopts retractable roof structure, and blower fan is positioned at air duct.
A kind of single evaporator type solar air source combined heat-pump of the present invention, is characterized in that: described condenser is water-cooled or air-cooled heat exchanger.
A kind of single evaporator type solar air source combined heat-pump of the present invention, is characterized in that: described first encloses face and second, and to enclose face be air-valve, warming plate, baffle plate or blind.
A kind of single evaporator type solar air source combined heat-pump of the present invention, is characterized in that: described blower fan encloses face and second first and to enclose between face, first to enclose outside face or second to enclose outside face.
A kind of single evaporator type solar air source combined heat-pump of the present invention, is characterized in that: described refrigerant tubing is positioned at the top of collecting plate, bottom or centre.
A kind of single evaporator type solar air source combined heat-pump of the present invention, is characterized in that: described thermal-arrest-evaporimeter slant setting, makes the exit position of refrigerant tubing higher than its entry position.
Adopt the operation method of a kind of single evaporator type solar air source combined heat-pump of the present invention, it is characterized in that: this operation method comprises following several operational mode:
A, solar heat pipe pattern: when solar radiation is sufficient, run solar heat pipe pattern, by the switching bypass compressor of triple valve, compressor and blower fan out of service, first encloses face and second encloses face and closes, and choke valve cuts out, valve open;
B, solar heat pump pattern: when solar radiation is stronger, but when solar heat pipe pattern cannot be produced temperature required hot water or be not enough to drive cold-producing medium Natural Circulation, run solar heat pump pattern, compressor is communicated with by the switching of triple valve, compressor is opened, blower fan stops, and first encloses face and second encloses face closedown, valve closing;
C, air-source heat pipe pattern: when there is no solar radiation, outside air temperature is higher and the hot water temperature of demand is not high time, run air-source heat pipe pattern, by the switching bypass compressor of triple valve, compressor is out of service, blower fan is opened, first encloses face and second encloses face unlatching, and choke valve cuts out, valve open;
D, air source heat pump pattern: when there is no solar radiation and outside air temperature is not enough to start air-source heat pipe pattern, run air source heat pump pattern, be communicated with compressor by the switching of triple valve, compressor and blower fan are opened and are run, first encloses face and second encloses face unlatching, valve closing;
E, solar energy-air source associating heat pipe pattern: when solar radiation is more weak, outside air temperature is higher and the hot water temperature of demand is not high, run solar energy-air source associating heat pipe pattern, by the switching bypass compressor of triple valve, compressor is out of service, blower fan is opened, first encloses face and second encloses face unlatching, and choke valve cuts out, valve open;
F, solar energy-air source associating heat pump mode: when solar radiation and outside air temperature are all not enough to drive the Natural Circulation of cold-producing medium but still have certain solar radiation, run solar energy-air source associating heat pump mode, compressor is communicated with by the switching of triple valve, blower fan is opened and is run, first encloses face and second encloses face and all opens, valve closing;
G, free convection air source heat pump pattern: when not having solar radiation, higher, the outdoor wind speed of environment temperature larger, run free convection air source heat pump pattern, compressor is communicated with by the switching of triple valve, compressor is opened and is run, blower fan cuts out, first encloses face and second encloses face and all opens, valve closing;
H, solar energy-free convection air-source associating heat pump mode: when solar radiation is more weak, outside air temperature is higher, extraneous wind speed is larger, run solar energy-free convection air-source associating heat pump mode, compressor is communicated with by the switching of triple valve, compressor is opened and is run, blower fan cuts out, first encloses face and second encloses face and all opens, valve closing.
The present invention's tool compared with existing hot water preparation system has the following advantages and the technique effect of high-lighting:
(1) relative to solar water heating system, combine effective utilization of air heat energy, realize solar thermal collector and air cooling heat exchanger two kinds of functions by an evaporimeter, the area of solar thermal collector can be reduced, reduce the energy consumption of auxiliary thermal source.
(2) relative to air source heat pump system, combine effective utilization of solar energy, solar energy improves the heat exchange amount of evaporimeter time sufficient, and then the area of air cooling heat exchanger is reduced when same load demand, system evaporating temperature can be improved simultaneously, make heat pump more efficient.
(3) relative to the heat pump of employing direct-expansion type solar energy heat collector and a wind-cooled evaporator, instead of solar thermal collector and wind-cooled evaporator with a thermal-arrest-evaporimeter, significantly can reduce costs under the prerequisite not affecting performance.
(4) there is multiple systems operational mode, run heat pipe pattern time evaporating temperature is high, heat efficiency high; Operating heat pump pattern time evaporating temperature is low, can make full use of the solar energy of Low emissivity intensity and the air heat energy of lower temperature.
(5) there is multiple thermal-arrest-evaporimeter operational mode, run solar energy heating pattern when solar radiation is strong, realize very high evaporating temperature; Solar radiation is more weak and air themperature is higher time run solar energy heating-air-cooled heat exchange united mode, make full use of solar radiation and air heat energy; Without the cold heat exchange pattern of solar radiation luck sector-style, utilize air heat energy to ensure reliability of heat-supply system simultaneously.
Generally speaking, solar energy and air source heat pump technology organically combine by the present invention, the mutual supplement with each other's advantages of both realizations, and effectively reducing initial cost and the operation energy consumption of heating, is a kind of heat supply and domestic hot-water's scheme of comparatively having application prospect.
Accompanying drawing explanation
Fig. 1 is the structural principle schematic diagram of a kind of single evaporator type solar air source combined heat-pump provided by the invention.
Fig. 2 is the thermal-arrest-evaporation structure diagrammatic top view of a kind of single evaporator type solar air source combined heat-pump provided by the invention.
Fig. 3 is the thermal-arrest-evaporation structure constructed profile of a kind of single evaporator type solar air source combined heat-pump provided by the invention.
Fig. 4 is the solar heat pipe pattern diagram of a kind of single evaporator type solar air source combined heat-pump provided by the invention.
Fig. 5 is the solar heat pump pattern diagram of a kind of single evaporator type solar air source combined heat-pump provided by the invention.
Fig. 6 is the air-source heat pipe pattern diagram of a kind of single evaporator type solar air source combined heat-pump provided by the invention.
Fig. 7 is the air source heat pump pattern diagram of a kind of single evaporator type solar air source combined heat-pump provided by the invention.
Fig. 8 is the solar energy-air source associating heat pipe pattern diagram of a kind of single evaporator type solar air source combined heat-pump provided by the invention.
Fig. 9 is the solar energy-air source associating heat pump mode schematic diagram of a kind of single evaporator type solar air source combined heat-pump provided by the invention.
Figure 10 is the free convection air source heat pump pattern diagram of a kind of single evaporator type solar air source combined heat-pump provided by the invention.
Figure 11 is the solar energy-free convection air-source associating heat pump mode schematic diagram of a kind of single evaporator type solar air source combined heat-pump provided by the invention.
Wherein: 1-thermal-arrest-evaporimeter; 2-valve; 3-choke valve; 4-condenser; 5-triple valve; 6-compressor; 11-collecting plate; 12-refrigerant tubing; 13-glass cover-plate; 14-heat-insulation layer; 15-blower fan; 16-first encloses face; 17-second encloses face.
Detailed description of the invention
Below in conjunction with accompanying drawing, structure of the present invention and the method for operation are described further.
Fig. 1 is the structure principle chart of a kind of single evaporator type solar air source combined heat-pump provided by the invention, Fig. 2 is the thermal-arrest-evaporation structure diagrammatic top view of a kind of single evaporator type solar air source combined heat-pump provided by the invention, and Fig. 3 is the thermal-arrest-evaporation structure constructed profile of a kind of single evaporator type solar air source combined heat-pump provided by the invention.This single evaporator type solar air source combined heat-pump comprises thermal-arrest-evaporimeter 1, compressor 6, condenser 4 and choke valve 3; Described compressor 6, condenser 4, choke valve 3 and thermal-arrest-evaporimeter 1 connect and compose heat pump cycle in turn; Described compressor 6 exports, thermal-arrest-evaporimeter 1 exports and pipeline between condenser 4 entrance arranges a triple valve 5, a valve 2 in parallel at the two ends of choke valve 3, and thermal-arrest-evaporimeter 1, triple valve 5, condenser 4 and valve 2 form heat pipe successively and circulate; Described thermal-arrest-evaporimeter 1 comprises collecting plate 11, refrigerant tubing 12, glass cover-plate 13, insulation material 14 and blower fan 15; Described refrigerant tubing 12 forms without glass cover plate-type solar thermal collector with collecting plate 11, refrigerant tubing 12 arranges glass cover-plate 13 with the top of collecting plate 11, bottom arranges insulation material 14, and described glass cover-plate 13, insulation material 14 and two sides, front and back enclose air duct; Arrange first respectively at the entrance and exit of air duct to enclose face 16 and second and enclose face 17, the first and enclose face 16 and second and enclose face 17 and adopt retractable roof structure, blower fan 15 is positioned at air duct.
Condenser 4 of the present invention adopts water-cooled or air-cooled heat exchanger.Described first encloses face 16 and second encloses face 17 for air-valve, warming plate, baffle plate or blind.Described blower fan 15 encloses face 16 and second first and encloses between face 17, or is positioned at first and encloses outside face 16, also can be arranged on second and enclose outside face 17.Described refrigerant tubing 12 is positioned at the top of collecting plate 11, bottom or centre.Described thermal-arrest-evaporimeter 1 slant setting, makes the entry position of exit position higher than refrigerant tubing of refrigerant tubing 12.
Fig. 4 is the solar heat pipe pattern diagram of a kind of single evaporator type solar air source combined heat-pump provided by the invention.Under this pattern compressor 6 by the switching of triple valve 5 by bypass, compressor 6 and blower fan 15 out of service, first encloses face 16 and second encloses face 17 and closes, and choke valve 3 cuts out.Thermal-arrest-evaporimeter 1 runs solar energy heating pattern, and system flow runs heat pipe pattern.The solar energy that thermal-arrest-evaporimeter 1 absorbs, successively by getting back to condenser 4 after valve 2, thermal-arrest-evaporimeter 1, triple valve 5, to be transferred in condenser 4 by Natural Circulation and being used for heating by the cold-producing medium that condenser 4 exports.This mode operation, in solar radiation is stronger time, relies on thermosiphon principle to complete the circulation of cold-producing medium, does not have energy resource consumption, have very high heating efficiency.
Fig. 5 is the solar heat pump pattern diagram of a kind of single evaporator type solar air source combined heat-pump provided by the invention.When solar radiation weaken cause solar heat pipe pattern cannot produce temperature required hot water or be not enough to drive cold-producing medium Natural Circulation time, then can run solar heat pump pattern.Be communicated with compressor 6 by the switching of triple valve 5, compressor 6 is opened, and blower fan 15 still keeps stopping, and first encloses face 16 and second encloses face 17 and close, and valve 2 is closed.Thermal-arrest-evaporimeter 1 runs solar energy heating pattern, system flow operating heat pump pattern.The cold-producing medium that condenser 4 exports is successively by getting back to condenser 4 after choke valve 3, thermal-arrest-evaporimeter 1, compressor 6, triple valve 5.Although this mode operation is in solar radiation is not too strong time, because solar heat pump circulation has higher evaporating temperature, it is also higher that it heats COP.
Fig. 6 is the air-source heat pipe pattern diagram of a kind of single evaporator type solar air source combined heat-pump provided by the invention.The hot water temperature at the night and demand that do not have solar radiation not high (as concurrent heating unit produces low-temperature water heating to soil concurrent heating) outside air temperature higher in, then can run air-source heat pipe pattern.Under this pattern, compressor 6 is by bypass, and compressor 6 is out of service, and blower fan 15 is opened and run, and first encloses face 16 and second encloses face 17 and all open, and choke valve 3 cuts out.Thermal-arrest-evaporimeter 1 runs air-cooled heat exchange pattern, and system flow runs heat pipe pattern.The air heat energy that thermal-arrest-evaporimeter 1 absorbs, successively by getting back to condenser 4 after valve 2, thermal-arrest-evaporimeter 1, triple valve 5, to be transferred in condenser 4 by Natural Circulation and being used for heating by the cold-producing medium that condenser 4 exports.Because this pattern relies on thermosiphon principle to complete refrigerant circulation, only need to consume a small amount of fan energy consumption, also there is very high heating efficiency.
Fig. 7 is the air source heat pump pattern diagram of a kind of single evaporator type solar air source combined heat-pump provided by the invention.When there is no the night of solar radiation but be not enough to start air-source heat pipe pattern, then can run air source heat pump pattern.Be communicated with compressor 6 by the switching of triple valve 5, compressor 6 and blower fan 15 all open operation, and first encloses face 16 and second encloses face 17 and all open, and valve 2 is closed.Thermal-arrest-evaporimeter 1 runs air-cooled heat exchange pattern, system flow operating heat pump pattern.The cold-producing medium that condenser 4 exports is successively by getting back to condenser 4 after choke valve 3, thermal-arrest-evaporimeter 1, compressor 6, triple valve 5.This pattern efficiency in evening that only temperature is very low is in the winter time slightly poor, still has higher to heat COP when temperature is not too low time.
Fig. 8 is the solar energy-air source associating heat pipe pattern diagram of a kind of single evaporator type solar air source combined heat-pump provided by the invention.When solar radiation is on the weak side, but outside air temperature is higher, as the dusk in summer, if the hot water temperature of demand not high (as concurrent heating unit produces low-temperature water heating to soil concurrent heating), then can run solar energy-air source associating heat pipe pattern.Under this pattern, compressor 6 is by bypass, and blower fan 15 is opened and run, and first encloses face 16 and second encloses face 17 and all open, and choke valve 3 cuts out.Thermal-arrest-evaporimeter 1 runs solar energy heating-air-cooled heat exchange united mode, and system flow runs heat pipe pattern.The cold-producing medium that condenser 4 exports is successively by getting back to condenser 4 after valve 2, thermal-arrest-evaporimeter 1, triple valve 5.Thermal-arrest-evaporimeter 1 simultaneously stability solar radiation and air heat energy under this pattern, and be used for heating by transfer of heat to condenser 4, thermosiphon principle is relied on to complete the circulation of cold-producing medium, only need to consume a small amount of fan energy consumption, not only there is very high heating efficiency, and compared with simple solar thermal collector or wind-cooled evaporator, there is larger heating capacity, can the time of heating be shortened.
Fig. 9 is the solar energy-air source associating heat pump mode schematic diagram of a kind of single evaporator type solar air source combined heat-pump provided by the invention.When solar radiation and outside air temperature be all not enough to drive cold-producing medium Natural Circulation but still have certain solar energy can provide utilization time, then can run solar energy-air source associating heat pump mode.Be communicated with compressor 6 by the switching of triple valve 5, blower fan 15 is opened and is run, and first encloses face 16 and second encloses face 17 and all open, and valve 2 is closed.Thermal-arrest-evaporimeter 1 runs solar energy heating-air-cooled heat exchange united mode, system flow operating heat pump pattern.The cold-producing medium that condenser 4 exports is successively by getting back to condenser 4 after choke valve 3, thermal-arrest-evaporimeter 1, compressor 6, triple valve 5.This pattern achieves making full use of of solar energy and air heat energy, has higher to heat COP and larger heating capacity.
Figure 10 is the free convection air source heat pump pattern diagram of a kind of single evaporator type solar air source combined heat-pump provided by the invention.When not having higher, the outdoor wind speed of night, the environment temperature of solar radiation larger, then can run free convection air source heat pump pattern.Be communicated with compressor 6 by the switching of triple valve 5, compressor 6 is opened and is run, and blower fan 15 cuts out, and first encloses face 16 and second encloses face 17 and all open, and valve 2 is closed.Thermal-arrest-evaporimeter 1 runs the air-cooled heat exchange pattern of free convection, system flow operating heat pump pattern.The cold-producing medium that condenser 4 exports is successively by getting back to condenser 4 after choke valve 3, thermal-arrest-evaporimeter 1, compressor 6, triple valve 5.This pattern can save blower fan power consumption, has higher system COP when temperature is not too low and outdoor environment wind speed is larger.
Figure 11 is the solar energy-free convection air-source associating heat pump mode schematic diagram of a kind of single evaporator type solar air source combined heat-pump provided by the invention.When solar radiation is more weak, outside air temperature is higher but be not enough to drive cold-producing medium Natural Circulation, extraneous wind speed is larger and required refrigerating capacity is less time, then can run solar energy-free convection air-source associating heat pump mode.Be communicated with compressor 6 by the switching of triple valve 5, blower fan 15 cuts out, and first encloses face 16 and second encloses face 17 and all open, and valve 2 is closed.Thermal-arrest-evaporimeter 1 runs the air-cooled heat exchange united mode of solar energy heating-free convection, system flow operating heat pump pattern.The cold-producing medium that condenser 4 exports is successively by getting back to condenser 4 after choke valve 3, thermal-arrest-evaporimeter 1, compressor 6, triple valve 5.This pattern achieves making full use of of solar energy and air heat energy, and does not have blower fan power consumption, can reach higher system COP.
Claims (7)
1. a single evaporator type solar air source combined heat-pump, comprises thermal-arrest-evaporimeter (1), compressor (6), condenser (4) and choke valve (3); Described compressor (6), condenser (4), choke valve (3) and thermal-arrest-evaporimeter (1) connect and compose heat pump cycle in turn, it is characterized in that: described compressor (6) outlet, thermal-arrest-evaporimeter (1) export on the pipeline between condenser (4) entrance and arrange a triple valve (5), a valve (2) in parallel at the two ends of choke valve (3), thermal-arrest-evaporimeter (1), triple valve (5), condenser (4) and valve (2) form heat pipe circulation successively; Described thermal-arrest-evaporimeter (1) comprises collecting plate (11), refrigerant tubing (12), glass cover-plate (13), insulation material (14) and blower fan (15); Described refrigerant tubing (12) and collecting plate (11) form without glass cover plate-type solar thermal collector, refrigerant tubing (12) arranges glass cover-plate (13) with the top of collecting plate (11), bottom arranges insulation material (14), and described glass cover-plate (13), insulation material (14) and two sides, front and back enclose air duct; Arrange first respectively at the entrance and exit of air duct to enclose face (16) and second and enclose face (17), first encloses face (16) and second encloses face (17) employing retractable roof structure, and blower fan (15) is positioned at air duct.
2. a kind of single evaporator type solar air source combined heat-pump according to claim 1, is characterized in that: described condenser (4) is water-cooled or air-cooled heat exchanger.
3. a kind of single evaporator type solar air source combined heat-pump according to claim 1, is characterized in that: described first encloses face (16) and second encloses that face (17) is air-valve, warming plate, baffle plate or blind.
4. a kind of single evaporator type solar air source combined heat-pump according to claim 1, is characterized in that: described blower fan (15) is positioned at first and encloses face (16) and second and to enclose between face (17), first enclose outside, face (16) or second and enclose outside, face (17).
5. a kind of single evaporator type solar air source combined heat-pump according to claim 1, is characterized in that: described refrigerant tubing (12) is positioned at the top of collecting plate (11), bottom or centre.
6. a kind of single evaporator type solar air source combined heat-pump according to the arbitrary claim of claim 1-6, it is characterized in that: described thermal-arrest-evaporimeter (1) slant setting, makes the exit position of refrigerant tubing (12) higher than its entry position.
7. adopt the operation method of a kind of single evaporator type solar air source combined heat-pump as claimed in claim 1, it is characterized in that: this operation method comprises following several operational mode:
A, solar heat pipe pattern: when solar radiation is sufficient, run solar heat pipe pattern, by the switching bypass compressor (6) of triple valve (5), compressor (6) and blower fan (15) out of service, first encloses face (16) and second encloses face (17) closedown, choke valve (3) cuts out, and valve (2) is opened;
B, solar heat pump pattern: when solar radiation is stronger, but when solar heat pipe pattern cannot be produced temperature required hot water or be not enough to drive cold-producing medium Natural Circulation, run solar heat pump pattern, compressor (6) is communicated with by the switching of triple valve (5), compressor (6) is opened, blower fan (15) stops, and first encloses face (16) and second encloses face (17) closedown, and valve (2) is closed;
C, air-source heat pipe pattern: when there is no solar radiation, outside air temperature is higher and the hot water temperature of demand is not high time, run air-source heat pipe pattern, by the switching bypass compressor (6) of triple valve (5), compressor (6) is out of service, blower fan (15) is opened, first encloses face (16) and second encloses face (17) unlatching, and choke valve (3) cuts out, and valve (2) is opened;
D, air source heat pump pattern: when there is no solar radiation and outside air temperature is not enough to start air-source heat pipe pattern, run air source heat pump pattern, compressor (6) is communicated with by the switching of triple valve (5), compressor (6) and blower fan (15) are opened and are run, first encloses face (16) and second encloses face (17) unlatching, and valve (2) is closed;
E, solar energy-air source associating heat pipe pattern: when solar radiation is more weak, outside air temperature is higher and the hot water temperature of demand is not high, run solar energy-air source associating heat pipe pattern, by the switching bypass compressor (6) of triple valve (5), compressor (6) is out of service, blower fan (15) is opened, first encloses face (16) and second encloses face (17) unlatching, choke valve (3) cuts out, and valve (2) is opened;
F, solar energy-air source associating heat pump mode: when solar radiation and outside air temperature are all not enough to drive the Natural Circulation of cold-producing medium but still have certain solar radiation, run solar energy-air source associating heat pump mode, compressor (6) is communicated with by the switching of triple valve (5), blower fan (15) is opened and is run, first encloses face (16) and second encloses face (17) and all opens, and valve (2) is closed;
G, free convection air source heat pump pattern: when not having solar radiation, higher, the outdoor wind speed of environment temperature larger, run free convection air source heat pump pattern, compressor (6) is communicated with by the switching of triple valve (5), compressor (6) is opened and is run, blower fan (15) cuts out, first encloses face (16) and second encloses face (17) and all opens, and valve (2) is closed;
H, solar energy-free convection air-source associating heat pump mode: when solar radiation is more weak, outside air temperature is higher, extraneous wind speed is larger, run solar energy-free convection air-source associating heat pump mode, compressor (6) is communicated with by the switching of triple valve (5), compressor (6) is opened and is run, blower fan (15) cuts out, first encloses face (16) and second encloses face (17) and all opens, and valve (2) is closed.
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